Fix crashes in rooms 9 and 13 (#415)

addons/escoria-core/game/core-scripts/esc/commands/inc_global.gd

@@ -27,7 +27,7 @@ func validate(arguments: Array):
 			]
 		)
 		return false
-	if not escoria.globals_manager.get(arguments[0]) is int:
+	if not escoria.globals_manager.get_global(arguments[0]) is int:
 		escoria.logger.report_errors(
 			"inc_global: invalid global",
 			[

addons/escoria-core/game/scenes/camera_player/esc_camera.gd

@@ -195,7 +195,7 @@ func target_reached():
 func _process(_delta):
 	zoom_transform = self.get_canvas_transform()
 
-	if follow_target and not tween.is_active() and follow_target.has_moved():
+	if is_instance_valid(follow_target) and not tween.is_active() and follow_target.has_moved():
 		self.global_position = follow_target.global_position
 
 func _ready():

addons/escoria-ui-simplemouse/game.gd

@@ -42,6 +42,7 @@ func _enter_tree():
 ## BACKGROUND ## 
 
 func left_click_on_bg(position: Vector2) -> void:
+	if escoria.main.current_scene.player:
 		escoria.do(
 			"walk", 
 			[escoria.main.current_scene.player.global_id, position],

project.godot

@@ -672,7 +672,6 @@ ui/default_transition="curtain"
 ui/transition_paths=[ "res://addons/escoria-core/game/scenes/transitions/shaders/" ]
 ui/main_menu_scene="res://game/ui/commons/main_menu/main_menu.tscn"
 ui/pause_menu_scene="res://game/ui/commons/pause_menu/pause_menu.tscn"
-internals/save_data=""
 
 [input]